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borrow finalization algo from sha1 (100byte smaller)

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Originally committed as revision 8383 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-03-13 12:19:20 +00:00
parent e1b62250ac
commit ef3c7c3328
1 changed files with 6 additions and 14 deletions
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20
libavutil/md5.c
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@ -139,22 +139,14 @@ void av_md5_update(AVMD5 *ctx, const uint8_t *src, const int len){
}
void av_md5_final(AVMD5 *ctx, uint8_t *dst){
int i, j;
int i;
uint64_t finalcount= le2me_64(ctx->len<<3);
j= ctx->len & 63;
ctx->block[j++] = 0x80;
av_md5_update(ctx, "\200", 1);
while((ctx->len & 63)<56)
av_md5_update(ctx, "", 1);
memset(&ctx->block[j], 0, 64 - j);
if( 56 < j ){
body( ctx->ABCD, (uint32_t*) ctx->block );
memset(ctx->block, 0, 64);
}
for(i=0; i<8; i++)
ctx->block[56+i] = (ctx->len << 3) >> (i<<3);
body(ctx->ABCD, (uint32_t*) ctx->block);
av_md5_update(ctx, &finalcount, 8);
for(i=0; i<4; i++)
((uint32_t*)dst)[i]= le2me_32(ctx->ABCD[3-i]);